Water Chemistry /
Do You Put Chlorine in a Saltwater Pool?
Yes. A saltwater pool still uses chlorine for sanitation, but the salt chlorine generator usually makes it for you. Keep testing and follow the manual.
Archive date: this article was written for PoolSkimmer on Oct 23, 2026 and given the earlier archive date of Mar 14, 2026 so the blog reads as an organized archive. It was not published on that date.
Is chlorine used in a salt water pool?
The answer is yes. While the water is kept in check by chlorine, you will not be pouring it in on a regular basis. A salt water pool relies on a salt chlorine generator to make the chlorine from the salt already in the water as part of its normal function. That said, do not let that lull you into complacency; routine testing and attention to water balance are still required.
The mechanics of a salt water pool
It is best to think of the system as changing how chlorine is made rather than doing away with it. By way of the pool’s circulation and the dissolved salt, the generator does the work for you. It is a chlorine pool in every sense, only one with automatic generation in place of manual dosing.
A few things to bear in mind: - Sanitary conditions depend on free chlorine being present. - The salt system has to be in good working order to put out chlorine. - You can expect water chemistry to be affected by the weather, debris or how many people are in the pool.
Adding chlorine to a salt pool
There are times when you may have to put some chlorine in by hand. If the generator is down, the levels are low, or the water has been put under stress from contamination or hard use, a top up is in order. This is an exception, however, not what you do day in and day out.
Do not guess at quantities or mix your chemicals. Refer to the product label and the equipment manual. Should you have any doubt as to what your system will take, put in a call to the manufacturer or a pool pro before you add anything.
Precautions before adding anything
Following a proper sequence will save you from making errors.
1. Shut off the pump. Do not put your hands in the skimmer basket while the suction is running. 2. Look at the water. Any cloudiness, odor or irritation is a sign of a sanitation or circulation issue. 3. Run a test. Keep tabs on the chlorine and other balance numbers, particularly after a storm or if you have had equipment trouble. 4. See what the generator is doing. An error light or lack of output means you should review the manual. 5. Give the filter a once over. Backwash or clean it in line with the manufacturer’s instructions.
Pitfalls to avoid
Assuming the system is fully automatic is a mistake that can leave a pool unsafe. Some of the more common errors are ignoring a low sanitizer reading, or thinking that salt is a total substitute for chlorine. Others will add chemicals without checking the label or handle the skimmers with the pump on. And just because the water appears fine is no reason to skip care.
For your own safety, stay out of the pool if you notice cloudy water, strong irritation or any hint of an electrical fault.
Time to call in a professional?
If you are dealing with a generator that will not stay on, or chlorine that refuses to hold steady despite your efforts, it is time to get some expert help. The same goes for persistent algae, a cloudy pool, or if you suspect something is amiss with the pump or filter. A qualified professional can verify the generator is putting out chlorine and put the water in order without any guesswork involved. They can also advise you on chemical compatibility if you are not certain.
Sources and further reading
- [Hayward: Weekly pool maintenance](https://www.hayward.com/maintenance/weekly-pool-maintenance)